ZHEJIANG KAYO MOTOR CO., LTD.
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58
The piston ring is over
worn
The piston ring opening gap or the
side gap is too wide
Insufficient elasticity of
piston ring
It is impossible to tight the piston
ring and the cylinder properly
Improper fixing
The piston ring gap is not staggered
Thick blue and white fume form
the exhaust muffler pipe
Refixing the piston
ring set
Piston pin
The piston pin is over
worn
The fitting clearance between the
piston pin and the hole is too wide
Striking sound of the piston pin
and of the cylinder
Replace the piston
pin
Connecting
rod
The
connecting
rod
small-end hole is over
worn
The fitting clearance between the
piston pin and the small-end is too
wide
Striking sound of the piston and
of the cylinder
Replace
the
connecting rod
The connecting rod is
crooked or twisted
The connecting rod is crooked or
twisted
Striking sound of the cylinder
Replace
the
connecting rod
The big-end hole is over
worn
Radial and axes gap of the
connecting rod big end is too large
Striking sound of the big-end
bearing and of the cylinder
Replace
the
connecting rod
Timing
sprocket
The gear is over worn of
damage
Abnormal sound during sprocket
driving
Replace the timing
sprocket
5.5
Maintenance of Mechanism
5.5.1 Disassemble, assemble and maintain valve mechanism
Remove rocker arm shaft
